View Compilation Error

0_0_30088678_3577.cpp: In function 'int main()':
0_0_30088678_3577.cpp:4:2: error: 'cin' was not declared in this scope
  cin>>m;
  ^
0_0_30088678_3577.cpp:18:3: error: 'cout' was not declared in this scope
   cout<<"Case: "<<n++;
   ^